I wish I had the skill to do the plugin(s). I really do.
I'll tell you what I think for what it's worth. One man's opinion.
Play count and scrobbling are essential functions that are integral to music listening across devices / platforms. I use these heavily, so my opinion is appropriately biased in that respect.
Track love is nice and nearly essential, but can be accomplished internally for every other purpose except interacting with the last.fm service, and screw them. What I mean by "accomplished internally" is that you could, if you wanted to, build a track love function into MusicBee tomorrow. Or people could utilize the rating function. Or people could just add tracks they really like to a playlist for such tracks. Loving tracks is a really "last.fm" specific thing. I don't use "love," so my opinion is again biased. It seem fairly redundant to me.
I've recently gotten really into the "similar artists" thing, but it is non-essential. You could even replace it with a function from another API like the Spotify Public API
if you really wanted to. If it were to go away, it would not be devastating.
Again, just one guy's input.